Device for grinding writing-pens.



P. DRsING. `DEVICE FOB. GRNDING WRITING PENS. y APPLICATIONIILED SEPT.30,1907.

` Patented oen, 6, v1908. f

3 SHEETS-#SHEET 1.

l P.- DORSIM.` DEVICEPOR GRINDING WRITING fPENS. APPLITION FILED SEPT.30, 1907.

Patented Oct.- 6,1908.

Wag/@6.556,5 M .7 f2@ P. VDRsINGr. DEVICE FOB. GRINDING WRITING PENSA. i

APPLICATION FILED SEPT. 30, 1907.

- Patented Oct.' 6, 1908.

s 'SHEETS-SHEET 3.

' f #WM/@Mama of Iserlohn, in the Province of Westphalia, i

'.cation.

Th .object of the present UNITED STATES PATENT oFFicE.

FRIEDRICH DRSING, 0F ISERLOHN, GERMANY, ASSIGNR TO THE FIRM OF F.SOENNEC-KEN,

l OF B ONN, GERMANY.

DEVICE 'Fon GRINDING WRITING-PENS.

f No. 900,271.

Specification of Letters Patent.

Patented oet. e, ieos.

Appiiation mea september 30,1907. 'serial No. 395,111.

To all whom Amayconcern: i

Be it known that I, FRIEDRICHf DRsING,-a subject of the King of-Prussia,and resident German Empire, have invented a new and useful Device forGrinding Writing-Pens, ofwhich the 'following is an exact specifi- Thisinvention relates to machines for grinding writing pens of the kind inwhich the `pens are held in resiliently mounted holders carried on arotating wheel. Insuch pen grinding machines it has been'prop'osed tomount the holders rotatably on the face of the rotating carrier but sucharrangements involve a complication of the 'parts for rotating the pen.so as to bring'all parts ofits curved back in contact with the grindingheel.

invention 1s t0.

*I avoid this complication.

In the machine according tothe presen-t invention the-pen is resilientlyheld ,between jaws formed at one end'ofa lever centrally pivoted onabracket on the circumference ofthe carrier wheel. lA curved bow springcooperates with a stop engaging the circumference ofthe carrier to 'holdthe pen in position for ..grinding.' The` curved spring however can'yield tov a suficie'nnextent to bring the pen at all points in itscurved back in contact with the grinding wheel and in v.this way'it isnot necessary to provide gearin for rotating the pen.

Tn' order to make my linvention better understood same is accompanied bya drawing,

which shows theconstuction of this device by lway of example.

l tion on line AQ-A of Fig. 1 ;Fig. 4 shows a On the' drawmgslEigurell'represents a sidefview 1 of the whole device; F1g.- 2 1s a planviewofsame; Fig. 3 represents a' secsection online B-B of Fig. l; Fig. 5shows in a side-view an enlarged detail of the penholder itself. Fig. 6is a plan View of this holder and Fig. 7 a front-view of same. l

The appliance which holds the pens con-l i sists of a wheel'a, theyshaft 7c" of which is journaled intothe vtwo 'pillow-blocks-" This penwheel a is set in motion' bymeans of a worm gearing, consisting of theworm wheel b and a long shaft b. The' latteris at the other sideprovided with a set of gears c', which connect it to the main dr1ving`.shaft c. l The latter is rotatedjmeans of a belt-pulley c2; Attached4to the one end'of the main shaft yc there is al rope disk d, i

loosening the v.set pine and sliding the 'ffixing the grinding wheel bytightening up the set screw e4. At the same time the pillow-blocks e2 ofthis wheel 'e is movably lattached to thefoundation-'block c3 in such amanner as to enable a raising and lowering of its position, Thiaiseffected byturning the handle c4 which bynmeans. well known-- a wedgeand a .screwffcause' Vthe raising and lowering"- of4 `the pillow block'.

On thesurface ofthe en Wheel a there are. attabhed'a-nunibero penholders conisisting' of thebody f 'and afflat springV f otally attachedto bolt if?, which bolt is `journal'ed in a pro'ecting lug a', attachedto tthe mainframe o penvwheel a. The body part f is provided with asemi-circular .piece f3, while a block f4 isattached to 'thegflat springf. This block-contains anothersemicircular piece f5, which representsthe ycoun-l terpart to f3, these two pieces `'bei-ng oppo# site oneanother 'and are exactly fitting one `on topI of the other. Betweenthese two pieces the pen is stuck. On thevl opposite side of the holdera set-screw g is placed. Furthermore lthere is a curved flat spring gprovided for, which is fastened at g2 to the This curved flat springhas. the tendency to turn the pen holder clockwise, so that the holderis forced against the circumference of latter by means of. the set-screwg. The body art f of the pen holder appliance is forked (SeeFigs. 4 and7.) yAt the place wherethe prongsunite there is-.a bolt the head wf f,of .which hits against a lever u. This lever Vis pivoted at u totliewheel aand provided with a roll .t at its extreme end.Thisfrollfslides on the circumference ofa ,disk af'wliich disk isplaced. next to the pen wheel .ag The disk s, is provided with groovefs", as lwillbe seen on Figli, the roll t sliding within this roove. Theform 'of the disk is constructe flike a. cam, congrinding wheel to thedesired position then tionv ofthe latter can bey adjusted to a certainextent in the direction of its shaft e by placed onthe-top. V The bodypart, j is piv- 'I frame of wheel a and at g8 to the lug f.-

the frame of-wheell c and hits against theof the cam leaves the portionSL rounded-0. y

lower si-de of the holder part f4. This motionacross the wheel e, as isshown way the main spring`gl grinding roller z5 strike the point wisethey sisting of two port-ions, of. which the one s2 has the' smaller andsa'the larger diameter. Both ,portionsunite at the points s4. and As.the roll t in sliding on the circumference at point. s, itis forced tomake an upward motion together with the lever u, thebolthead and pushesthe bolt upward under com ression of spring fw, whereby the bolt end ofa: strikes against the opens the holder, so that thegrip of same on thepen relaxes and the latter drops out. As long as the roll t slides overthe elevated 15 cam-part s3 the pen holder remains open,

whichl furnishes sufficient timeto replace a 'new pen into the holder.As the rolltL slides over point s4 it drops to the lower part s2 of thecam s, `andin turn lever u and boltw fol- 20 low sui t, whereby thepen-holder shuts itself,

The parts f3 and f5 holding the pens, are made exchangeable and Imay bedisposed across the surface of' pen wheel a., an arrangement as is`shown in Fig. 1, or tangen- 25 tially to the surface of this wheel, asis indicated on Fig. 4. This pen-holder-appliances however may beprovided with two of such pen grips each, of which one is arrangedacross and one tangentiallyto the pen-wheel.

The worlring of the apparatus is as follows: The whole device isactuated from the main shaft c, which puts the grinding wheel c as wellas the pen wheel a 1nv motion. In case thepen holder devices arearranged in Fig. 1, the pens to be ground are placed into same beforethey reach the grinding wheel c. Thus the pens are connected ing wheelin a manner, whereby the edge 40 of 'each pen strikes the wheel firstand while passing by a grinding of the pen takes place over its entirebreadth. This is made possible 011 account of the flexibility of the penholder appliance given to it by the is fastened. For back as the pen cand in doing so counter-,.ction of As soon as the pen leaves the wheelthe spring g will force the pen-holder back to its original position ofrest, which is determined by the set screw y. After the grindingmanipulation 'the pens are withdrawn from the holders, but if the S5 ofthe cam s the pens are dropped automatically, inasmuch as each holder isthen opened by the bolt ai striking against the lower side of pen-holderpart f4. If the pens are to be ground lengthare replaced into theholders tangentially to the pen-wheel c and as a matter of course, thepen holder appliances have to bel disposed' in a similar position. Thegrinding wheel e is -then to be shifted until `each holder is swingingpasses the grinding wheel has to overcome a certain spring g.

it comes into the path of the rotating pen.

which in turnhits to the grindi wheel, a rotating pen holder carrier,means for bringing all points of the curved surface of the pen evenly incontact. with the grinding wheel. comprising, spring pressed pivoted penholding jaws.

In a pen grinding machine, a.- grinding wheel, a rotating' pen holdercarrier, means for bringing all points of Vthe curved surface of the penevenly in contact with the grind` ing wheel comprising,pivoted penholder jaws, curved bows springs holding said penholding jawsresiliently.

A pen grinding machineliaving in combination, a grinding wheel, acarrier wheel, p'en holding jaws pivotally carried on the circumferenceof said wheel about axes parallel to the axis of the carrier wheel, a

bow spring pressing said penholding jaws i radially outward for thepurpose set forth.

4. A pen grinding machine having in combination, a grinding wheel, aearrierwheel, centrally pivoted penholding jaws carried on thecircumference of said wheel about axes parallel to the axis of thecarrier wheel, bow springs pressing said penholding jaws radiallyoutwards at one end, stop pins on theopposite end of said centrallypivoted jaws to the penholding side and co-acting ,with thecircumference of the carrier wheel the jaws, substair.

to limit the motinof tially as described.

5. A pen grinding machine having in combination, a grinding wheel, acarrier wheel, pivots mounted on the circumference of said carrier wheeland parallel to the 'axis thereof, penholding jaws carried on saidpivots and comprising a pivoted inner jaw part,

an outer jaw part, a band spring holding said outer to said inner jawpart together with a bow spring resiliently pressing said inner jaw partradially outwards.

(3.v A pen grinding machine having in coinbination, a grinding. wheel, acarrier wheel, pivots on the circumference of the pivot wheel andparallel to the axis thereof, penholding jaws carried on said pivots andcomprising a. pivoted inner jaw part, an outer jaw part, said jaw partsbeing provided with axially and, tangentially arranged, gripping parts,a band spring holding said outer to said inner jaw part together with abow spring resiliently pressing said inner jaw part radially outwards atthe pcnholding end.

7. A pen grinding machine having in combination, a grinding wheel, acarrier wheel.

` carrierwheel and parallel to the axis there.

said pivotsand comprisingiapivoted inner holding. side, an outer jawpart, aband bination, a grinding wheel, a carrier wheel,

cumference of said carrier wheel, pivots 'in `said bracketsv arrangedparallel to the, carrier wheel axis, holdingjaws carried centrally bysaid pivots, a .bow spring xed at -cumferenc'e of said carrier wheel,pivots .in

lrier 4wheel axis, holding jaws carried cencomb'ifnation, a grindingwheel, a carrierv wheel, brackets projecting radially from. thelcircumference of said carrier wheel, pivots in `A said brackets arrangedparallel` to the car` j pivots mounted on the circumference of said' of,pen holding jaws' .carried centrally on jaw part with an opening thereinat the pen? said brackets arranged parallel to thecartrally by saidpivots, spring pressing means acting to press said penholding jawsradially outwards at one end. A

9. A pen grinding machine having in comrbrackets projecting radiallyfrom the cirone end to the carrier wheel and at its other end lto theholding jaws soa's to presssaid jaws radially outwards at oneend.

l0."v A i pen grinding machine having in .right angles to each otherthereon,l

ing said further jaw .rier wheel axis,j holding jaws carried centrallyby said pivots, spring pressing means acting to presssaid penholdingjaws radially. outwards at-one end,.means for releasing said holdingjaws comprising pins Imovable 1 in the plane of the carrier and camoperating means for said pins.

.11. A pen grindinginachine having in combination, a grinding wheel, acarrier wheel, brackets projecting radially from the circumference ofsaidcarrier wheel, pivots in said brackets arranged parallel to the car?rier wheel axis, holding jaws carried cen-l trally by said pivots, a bowspring fixed at one end to the carrier wheeland its other end to theyholding aws for pressing the same radially outwards at one end, meansfor releasing said jaws comprising spring held.v

pins slidable in the carrier, pivoted levers on :the carrier engagingsaid pins and a xed cam-withwhich' said levers engage.

' 12. In a pengrinding machine, penholding jaws comprisingapivotallycarried jaw part fwith semi-circular projections y?) at urtherjawparts each'in the form of a plate having 'semi-circular recessesengaging over said semi-circular projections, a flat spring carrylate atone end an'd fixed to the first mentloned jaw part at vthe other end. l

In witness whereof I- have hereunto set my hand in the presence of twowitnesses'.

' FRIEDRICHDRSING.

Witnesses: Y Y

R. SCHMIDT, F. THEI.

